What was Barack Obama's #FirstTweet?

It came when he was still a senator from Illinois:Thinking we're only one signature away from ending the war in Iraq. Learn more at http://www.barackobama.com— Barack Obama (@BarackObama) April 29, 2007Obama was already running for president and was was leading the charge to end the Iraq War, which became a campaign issue in the '08 election and remained a challenge throughout his presidency. We looked up his first tweet because Twitter, which celebrated its eight anniversary on Thursday, is having …